Surname List: Begins with O


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All surnames beginning with O, sorted alphabetically (total individuals):

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1. o 'Beolan (2)
2. o 'Brien (1)
3. o 'Callaghan (8)
4. o' Bannon (1)
5. o' Bell (9)
6. o' Beolain (1)
7. o' Boyle (1)
8. o' Breen (18)
9. o' Brennan (1)
10. o' Brian (12)
11. o' Brien (221)
12. o' Brien de Thomond (3)
13. o' Brien-Ara (1)
14. o' Bryan (5)
15. o' Bryen (4)
16. o' Byrne (4)
17. o' Caerbhaill (1)
18. o' Cahan (5)
19. o' Callaghan (20)
20. o' Carrol (1)
21. o' Carroll (7)
22. o' Cavanagh (2)
23. o' Cearbhall (2)
24. o' Cheinnselaig (14)
25. o' Chennselaig (1)
26. o' Chorb (1)
27. o' Chuind (1)
28. o' Conaing (1)
29. o' Connell (60)
30. o' Conner (1)
31. o' Conners (1)
32. o' Connor (60)
33. o' Connor-Kerry (1)
34. o' Conor (4)
35. o' Conor Sligo (1)
36. o' Crega (1)
37. o' Cuillen (1)
38. o' Daire Rainey (1)
39. o' Dea (2)
40. o' Dell (5)
41. o' Dennel (1)
42. o' Docherty (2)
43. o' Donell (1)
44. o' Donnagan (1)
45. o' Donnel (1)
46. o' Donnell (18)
47. o' Donnell von Tyrconell (3)
48. o' Donoghue (1)
49. o' Donovan (3)
50. o' Draine (1)
51. o' Duibhne (1)
52. o' Dungalaig (1)
53. o' Duraghy (1)
54. o' Eagra (1)
55. o' Eidin (1)
56. o' Fallon (2)
57. o' Faolain (2)
58. o' Farrell (2)
59. o' Felan (1)
60. o' Ferral (1)
61. o' Ferrall-Boy (2)
62. o' Flaherty (4)
63. o' Fogarty (1)
64. o' Fogurty (1)
65. o' Garvey (2)
66. o' Grady (41)
67. o' Hagan (3)
68. o' Halloran (1)
69. o' Hara (28)
70. o' Hartigan (1)
71. o' Hea (1)
72. o' Hegerty (4)
73. o' Kane (2)
74. o' Keefe (5)
75. o' Keeff (1)
76. o' Keeley (3)
77. o' Kelly (6)
78. o' Kennedy (8)
79. o' Key (1)
80. o' Killey (1)
81. o' Knightley (2)
82. o' Lalor (1)
83. o' Lavery (2)
84. o' Leary (6)
85. o' Lorcain (1)
86. o' Loughnan (1)
87. o' Madden (2)
88. o' Mahony (1)
89. o' Maille Owen (1)
90. o' Maillend (3)
91. o' Malia (1)
92. o' Malley (3)
93. o' Mara (10)
94. o' Meagber (1)
95. o' Mealy (1)
96. o' Melaghlin (5)
97. o' Moore (14)
98. o' Morda (1)
99. o' More (5)
100. o' Mullane (1)
101. o' Mulloy (1)
102. o' Mulyran (1)
103. o' Murphy (1)
104. o' Neal (11)
105. o' Neale (3)
106. o' Neall (9)
107. o' Neil (3)
108. o' Néill (103)
109. o' Neill de Tyrone (1)
110. o' Nolan (1)
111. o' Phelan (1)
112. o' Pluingceid (1)
113. o' Quin (1)
114. o' Rear (1)
115. o' Regan (1)
116. o' Reilly (4)
117. o' Rorke (4)
118. o' Rourk (2)
119. o' Rourke (1)
120. o' Ruarc (5)
121. o' Ryn (1)
122. o' Shaughnessy (7)
123. o' Sullivan (14)
124. o' Sullivan Beare (2)
125. o' Tard la Grange-Keith (1)
126. o' Toole (16)
127. O'Blennis (1)
128. Oachs (4)
129. Oak (1)
130. Oakden (1)
131. Oakes (33)
132. Oakey (5)
133. Oakleaf (1)
134. Oakley (16)
135. Oaks (6)
136. Oates (3)
137. Obachah (1)
138. Obama (5)
139. Obanion (1)
140. Obbard (1)
141. Obbema (1)
142. Obbens (1)
143. Obdam (1)
144. Obedience (1)
145. Obelink (1)
146. Obelitz (1)
147. Obell (1)
148. Oben (2)
149. Obenberg (1)
150. Obeniche (1)
151. Ober (7)
152. Oberacker zu Sieghartsstein (1)
153. Oberembt (2)
154. Oberhlotzer (1)
155. Oberholster (16)
156. Oberholzer (6)
157. Oberleuter von Lassing (1)
158. Oberlin (2)
159. Oberländer (4)
160. Obermair (2)
161. Obermayer (2)
162. Obermeyer (1)
163. Obernaür (1)
164. Oberstadt (1)
165. Obertacke (1)
166. Oberti (2)
167. Obijn (1)
168. Obolenska (1)
169. Obolenskaia (1)
170. Obolenskaja (1)
171. Obolensky (18)
172. Obolensky-Neledinsky-Meletzky (4)
173. Oboussier (1)
174. Obreen (2)
175. Obrenović (7)
176. Obrenovic (7)
177. Obrist (1)
178. Obukova (1)
179. Occo (1)
180. Och (1)
181. Ochoa de Ondategui (2)
182. Ochs von Gunzendorf (2)
183. Ochs von Sonnau & Reichersperg (2)
184. Ochsin von Gunzendorf (1)
185. Ochterlony (3)
186. Ocieska (1)
187. Ockel (2)
188. Ockens (4)
189. Ockers (14)
190. Ockers Cau (2)
191. Ockerse (7)
192. Ockersse (27)
193. Ockerz. (1)
194. Ockes (2)
195. Ockhorst (4)
196. Ockhuysen (1)
197. Ockinga (5)
198. Ockstee (1)
199. Ocskay de Ocsko (1)
200. Octavius (1)
201. Octon (1)
202. Odard (1)
203. Odart (5)
204. Odart de Rilly d'Oysonville (1)
205. Odberre (1)
206. Odde (1)
207. Oddie (6)
208. Odding (1)
209. Oddyle (2)
210. Odé (1)
211. Odell (18)
212. Odendaal (21)
213. Odendahl (1)
214. Odenhoven (1)
215. Odenthal (1)
216. Oder (3)
217. Odescalchi (29)
218. Odescalchi di Novara (1)
219. Odet (1)
220. Odette (1)
221. Odgers (1)
222. Odier (2)
223. Odijk (1)
224. Odilia (1)
225. Odinck (1)
226. Odingsells (3)
227. Odink (1)
228. Odino (1)
229. Odinot (2)
230. Odinsson (1)
231. Odiorne (1)
232. Odland (4)
233. Odling (1)
234. Odlum (2)
235. Odoe (1)
236. Odoevskaya (2)
237. Odoevsky (1)
238. Odom (4)
239. Odone (4)
240. Odor (1)
241. Odou (1)
242. Odoyevskaya (1)
243. Odrowazowna (1)
244. Odson (1)
245. Odum (1)
246. Odygd (3)
247. Oechslin (1)
248. Oedses (1)
249. Oedtsma (3)
250. Oedtsma van Juckema (3)
251. Oeheim (2)
252. Oehler (1)
253. Oehlmann (1)
254. Oehninger (1)
255. Oeijen (1)
256. Oelbermann (1)
257. Oeler (5)
258. Oelhafen (1)
259. Oeloffse (1)
260. Oelofse (17)
261. Oelrichs (5)
262. Oelwein (1)
263. Oem (27)
264. Oem van Papendrecht (1)
265. Oem van Wijngaarden (33)
266. Oem van Wijngaerden (6)
267. Oem van Wyngaerden (1)
268. Oem van Zevender (2)
269. Oemcens (1)
270. Oenema (4)
271. Oentses (1)
272. Oepkes (2)
273. Oerinck (1)
274. Oerlemans (3)
275. Oertgen (2)
276. Oerthling (1)
277. Oertwein (2)
278. Oertwin (1)
279. Oesau (31)
   280. Oesebrand (1)
281. Oeser (2)
282. Oessendorff (1)
283. Oest (9)
284. Oesterberg (1)
285. Oesterlen (1)
286. Oesterling (1)
287. Oestermann (3)
288. Oesters (1)
289. Oesterschmidt (1)
290. Oestherhaut (1)
291. Oeters van Maris (1)
292. Oetgens (10)
293. Oetgens van Waveren (5)
294. Oetgens van Waveren Pancras Clifford (16)
295. Oetgins (2)
296. Oetinger (2)
297. Oetker (9)
298. Oettingen (3)
299. Oettingen Ettinger-Halevi (1)
300. Oevermans (1)
301. Oexle von Friedenberg (1)
302. of Acre (1)
303. of Acton (2)
304. of Agade (2)
305. of Ailech (1)
306. of Albha (1)
307. of Alcester (1)
308. of Aleppo (1)
309. of Allardice (1)
310. of Aller (4)
311. of Allerdale (1)
312. of Anathoth (1)
313. of Androssan (1)
314. of Angeln (3)
315. of Angoulême (1)
316. of Angus (16)
317. of Antioch (1)
318. of Anu (1)
319. of Argyll (3)
320. of Argyllshire (12)
321. of Arimathaea (1)
322. of Armorica (2)
323. of Arrapachtis (1)
324. of Aspinall (4)
325. of Athol (5)
326. of Atholl (6)
327. of Babylon (3)
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333. of Bedford (2)
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335. of Bermingham (1)
336. of Bernica (16)
337. of Bernicia (4)
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342. of Borthwick (2)
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344. of Bothwell (1)
345. of Braytoft (1)
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347. of Bristol (1)
348. of Britons (1)
349. of Brittany (1)
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353. of Caithness (7)
354. of Callendar (3)
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356. of Cardigan (1)
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361. of Chattan (10)
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366. of Cimmerians (11)
367. of Cinneal Eoguin (1)
368. of Clarence (4)
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371. of Connaught (4)
372. of Corbi (1)
373. of Cornwall (28)
374. of Cranntock (1)
375. of Cumbria (2)
376. of Dalradia (6)
377. of Deheubarth (1)
378. of Deira (2)
379. of Denia & Balearic (1)
380. of Denmark (2)
381. of Desmond (1)
382. of Devon (3)
383. of Dimitia (1)
384. of Docwra (1)
385. of Dol (5)
386. of Dorset (1)
387. of Douni (2)
388. of Draffen (1)
389. of Dublin (9)
390. of Dule (1)
391. of Dull (1)
392. of Dunbar (23)
393. of Durham (3)
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395. of East Anglia (11)
396. of Eccles (2)
397. of Egypt (13)
398. of England (82)
399. of Essex (4)
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411. of Galbraith (2)
412. of Galicia (3)
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414. of Galloway (2)
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416. of Gibeah (2)
417. of Gilsland (3)
418. of Gloucester (12)
419. of Granada (1)
420. of Greece (1)
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428. of Haselden (5)
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432. of Helgot (1)
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434. of Holland (10)
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436. of Huntingdon (10)
437. of Huntington (5)
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439. of Ireland (14)
440. of Isbell (2)
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443. of Italy (2)
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447. of Judah (18)
448. of Jutland (3)
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450. of Kent (30)
451. of Khazaria (2)
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456. of Kingsley (6)
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468. of Lincoln (3)
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470. of Lochaber (8)
471. of Lochore (1)
472. of Lorn (6)
473. of Lot (2)
474. of Lumley (7)
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476. of Luss (2)
477. of Lyon Logie (1)
478. of Macedonia (1)
479. of Man (5)
480. of Man & Dublin & the Isles (1)
481. of Mar (6)
482. of Marr (1)
483. of Mawddy (1)
484. of Meirionydd (2)
485. of Menteith (2)
486. of Menteth (2)
487. of Mercia (71)
488. of Mexico (2)
489. of Middleton (1)
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491. of Moab (2)
492. of Montal (1)
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496. of Monymusk (1)
497. of Moray (5)
498. of Mostyn (1)
499. of Moynet (2)
500. of Munster (2)
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503. of Newton (2)
504. of North Wales (1)
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507. of Northumberland (7)
508. of Northumbria (20)
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510. of Nottingham (2)
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512. of Orbe, Switzerland (1)
513. of Orkney (15)
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519. of Ossory (3)
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531. of Ross (10)
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536. of Salisbury (3)
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538. of Sanford (3)
539. of Scotland (73)
540. of Scots (1)
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545. of Shropshire (2)
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558. of Stra... (2)
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561. of Strathearn (21)
562. of Strathnaver (2)
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567. of Tamworth (1)
568. of Tatshull (1)
569. of the Angles (3)
570. of the Aztecs (1)
571. of the Balearic Isles (1)
572. of the Baltic Goths (1)
573. of the Chaldees (1)
574. of the Gainas (1)
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576. of the Iceni (1)
577. of the Isle of Wight (1)
578. of the Isles (5)
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580. of the Kumans (2)
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591. of Throndheim (3)
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596. of Troy (41)
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598. of Ulster (6)
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